Resolve the ‘CMUSBDAC.sys Blue Screen Error’ on Your Windows PC

Encountering a Blue Screen of Death (BSOD) can be a daunting experience, especially when it disrupts your workflow or gaming sessions. If you’re facing the ‘CMUSBDAC.sys Blue Screen Error’ on your Windows PC, this guide is tailored to help you address the issue effectively. As we walk through the solutions, remember that the methods provided are updated and designed to cater to the latest versions of Windows operating systems, such as Windows 10 and Windows 11. Let’s dive in and get your system back up and running smoothly.

Understanding and Tackling the ‘CMUSBDAC.sys Blue Screen Error’

The BSOD error you’re encountering often arises when you use a USB microphone or C-Media USB Audio Class Driver on your PC. The ‘CMUSBDAC.sys Blue Screen Error’ can be caused by several issues, including outdated drivers or incompatible software. Below are the steps to diagnose and resolve the problem to restore your system’s stability.

Updating Your Motherboard Drivers

Outdated or incompatible motherboard drivers are a common cause of the ‘CMUSBDAC.sys Blue Screen Error’. Bringing your system drivers up-to-date can sometimes immediately resolve the issue. Here’s how you can update your motherboard drivers on a Windows PC:

  1. First, determine your motherboard model by pressing Windows Key + R, typing ‘msinfo32’, and noting the information listed under Motherboard Model in the System Summary.
  2. Visit the official website of your motherboard manufacturer and download the latest drivers corresponding to your specific motherboard model.
  3. Install the updated drivers by following the on-screen instructions and then restart your PC to see if the issues have been resolved.

Installing ASIO4All Drivers

In some cases, third-party microphones can trigger BSODs due to driver conflicts in Windows 10 or Windows 11. A widely recommended workaround is to install the ASIO4All driver, which can potentially fix the blue screen error originating from ‘CMUSBDAC.sys’:

  1. Disconnect your USB microphone from your PC.
  2. Download the latest ASIO4All driver by navigating to the official ASIO4All website and selecting the appropriate version based on your language.
  3. Run the ASIO4All installer and follow the setup process till completion, then reboot your computer.
  4. Once your system restarts, reconnect your USB microphone and check if the BSOD error has been resolved.

Removing Incompatible C-Media Audio Class Drivers

The ‘CMUSBDAC.sys’ file is often tied to C-Media audio drivers, which might not be fully compatible with Windows systems. Removing these drivers and allowing Windows to utilize generic drivers instead could eliminate the BSOD:

  1. Open the Run dialog by pressing Windows Key + R, type ‘devmgmt.msc’, and press Enter to access the Device Manager.
  2. Expand the ‘Sound, video, and game controllers’ section, right-click on the C-Media USB Audio Class driver, and choose ‘Uninstall Device’.
  3. Follow the prompts to complete the uninstallation then reboot your PC.
  4. Upon restarting, Windows should use the standard audio drivers, potentially resolving the ‘CMUSBDAC.sys’ BSOD issue.


After completing these steps, your PC should be free of the ‘CMUSBDAC.sys Blue Screen Error’, allowing you to engage in your daily activities without interruption. It’s crucial to keep your drivers updated and to be vigilant about incompatible software that could compromise your system’s performance.


Q: What is the ‘CMUSBDAC.sys’ file?

A: The ‘CMUSBDAC.sys’ file is associated with third-party audio drivers, often for USB microphones or audio interfaces, known as the C-Media USB Audio Class Driver.

Q: How can I prevent future ‘CMUSBDAC.sys Blue Screen Errors’?

A: Regularly updating your device drivers, operating system, and avoiding the use of outdated or incompatible peripherals can reduce the likelihood of experiencing BSODs related to ‘CMUSBDAC.sys’.

By following these guidelines, you’re not only resolving the immediate problem but also optimizing your PC for better performance and reliability.

Editorial Staff
Editorial Staff
The Bollyinside editorial staff is made up of tech experts with more than 10 years of experience Led by Sumit Chauhan. We started in 2014 and now Bollyinside is a leading tech resource, offering everything from product reviews and tech guides to marketing tips. Think of us as your go-to tech encyclopedia!


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